Duncan Sheik first came to prominence in the mid-1990s as a pop singer-songwriter, carving out airy, pleasing songs like “Barely Breathing” and “She Runs Away.” For all the lapidary artistry of these gems, he envisioned...

To be active in American politics is to be angry. Liberals and conservatives are angry at each other all the time, for reasons we won’t go into here. But what about the angry center? Who speaks for the moderates, who hate the...